Introduction: Villager Defence Door !!!
Step 1: Make an Entrance Way
Step 2: Add a 2 Block High Cobble Pillar
Step 4: Add Sand and 3 Cacti
Step 5: Destroy the Bottom Two Blocks and Place a Door Like in the Picture
Step 6: (creative Only) Add a Villager Holder
Step 7: Spawn Zombies and You're Done!!!